The Phoenix woman accused of shoving a vibrator into her 2-year-old son's anus has pleaded not guilty to charges in the case. The vibrator had to be surgically removed. Rickesha Burns, 21, called police almost two weeks ago, reporting that her son was bleeding from his anus but said she didn't know exactly what happened. She said she was at a park with her son that day, March 24, and while she was "looking at a text message for about 10 seconds," a boy she didn't know at the park did "something" to her son, according to court documents obtained by New Times. "She said she does not know what he did but is sure he did something," a probable-cause statement says. The boy was brought to Phoenix Children's Hospital, and doctors discovered that he had numerous bruises around his anus, a "hanger-type" bruise on his hip, and yet another bruise on his neck. Doctors also found an object lodged in his rectum, which appears to be "a vibrator or some other sex toy." Police interviewed Burns, who still claimed that a teenage boy at a park did it, even though she "believes it is her vibrator," and police found the boy's blood on her shirt, according to court documents. A Phoenix police spokesman said there was zero evidence that the boy was assaulted at the park. Burns told police that she "worked hard to get her son back and would not do anything like this to hurt her son." Indeed, court records show that Burns was investigated for child abuse in 2011, but it doesn't appear that criminal charges were ever filed. State records don't show any criminal history for Burns, other than a couple of misdemeanor cases related to driving without the proper documentation. Burns' son needed to have surgery to get the vibrator removed, according to court documents. Police said the injuries around the boy's anus appear to be caused by a hanger, or similar object, being used in an attempt to get the vibrator out. At her arraignment today, Burns pleaded not guilty to the charges against her, including sexual conduct with a minor and child abuse. A judge had previously ordered that Burns be held without bond. Her next court date is scheduled for May 23.